BIOL 111 Lecture Notes - Lecture 24: Prehensile Tail, Pelvimetry, Depth Perception

• School: McGill University
• Department: Biology
• Course: BIOL 111
• Professor: Andrew Hendry

Document Summary

Once found on all continents now just madagascar, se asia, africa. Largest eyes in relation to body size. Prehensile tail is only in new world monkeys, evolved after. Gibbons are smaller with long arms, for trees. Orangutans, too large to cross trees from branch to branch, African apes (gorillas, chimpanzees, bonobos, and hominids) Flatness of face, head shape, pelvis shape. Humans are just juvenilized apes (closer to chimps) Bipedal, upright, did not use arms for walking. Retains primitive large big toe for grasping. 35% size of modern brain (but still bigger than most) Tool use 2 mya, evidence in fossil record ( chimpanzees use. Body almost as large as humans, small brain, thick skull. Disappeared 30000 ya possibly due to homo sapiens(?) Spread out of africa across eurasia, to rest of world. Many human species interacting at this time. Genetic data: 1. 5-2. 1% dna in non-africans is neanderthal. 4-6% dna in new guinea, australia (melanesia) with denisovans.